东海S气田H8段主力储层单砂体刻画研究与应用  

Research and application of individual sand body characterization in main reservoirs of H8 Member of S Gasfield in East China Sea

作　　者：刘灵童 胡云亭 许胜利 LIU LingTong;HU Yun Ting;and XU ShengLi(Unconventional Technology Research Institute,Engineering Technology Branch of CNOOC Energy Development Co.,Ltd.)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司非常规技术研究院

出　　处：《低渗透油气田》2018年第2期12-17,共6页

摘　　要：低渗透砂岩储层物性差,直井产能低,水平井能最大限度地释放产能,但需开展储层砂体精细刻画,降低海上布井风险,实现经济有效开发。在沉积相研究的基础上,对厚河道砂体纵向采用“界面回返幅度法”识别单砂体边界,划分了4期河道,并通过地层倾角测井同层相似性进行验证;依据地震波形特征对横向单砂体边界进行追踪识别,查明单河道宽度范围为400~600m;根据河道的切叠程度将单砂体叠置类型划分为3类;自下而上河道经历了发育初期、繁盛期至萎缩期。综合研究分析认为,砂体纵向叠置程度越高,横向上砂体叠置连片性越好,繁盛期(H882)砂体分布面积大且稳定,储层物性相对较好,为水平井目标层。Low-permeability sandstone reservoirs have poor physical properties,and the productivity of vertical wells is low,while horizontal wells can release their production capacity to the maximum extent.However,it is necessary to carry out fine-grained description of reservoir sand bodies to reduce the risk of offshore wells and achieve economical and effective development.On the basis of the study of sedimentary facies,the "interface return amplitude method"was used to identify the boundary of the individual sand body in the longitudinal direction to the thick channel sand body,and the river channel was divided into four stages and verified by the same layer similarity of the formation dip angle logging.According to the characteristics of the seismic waveform,the boundary of the horizontal single sand body is tracked and identified,and the width of the single channel is determined to be 400-600 m.The single sand body stacking types are divided into three types according to the degree of cut and stacking of the river channel. From bottom to top the channel has experienced the early development,the prosperous period,and the shrinking period.Through comprehensive research and analysis,it is considered that the higher the vertical stacking degree of the sand body,the better the link-up (contiguousness)of the sand body stacking in the lateral direction.In the prosperous period (H8B2),the distribution area of the sand body is large and stable,and the physical properties of the reservoirs are relatively good,which is the target layer of the horizontal wells.

关 键 词：厚河道 单砂体 地层倾角测井 叠置类型 水平井 

分 类 号：TE132.1[石油与天然气工程—油气勘探]